Square Bolts?

Stoker Coal Boilers automatically feed the coal and have controls and pumps just like any conventions boiler. They are intended to be used as a primary heat and often have domestic hot water coils as an added bonus. They can be set up independently or in dual sytem with your existing oil/gas boiler. They can accommodate both hot water base board or steam plumbing.
daluds
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Posts: 282
Joined: Fri. Jun. 20, 2008 9:27 am
Stoker Coal Boiler: EFM DF520
Coal Size/Type: Rice
Stove/Furnace Make: EMF
Stove/Furnace Model: DF-520

Post Sun. Jan. 05, 2014 6:47 pm

I have to clean out the 7 holes in the upper tube every month, and I find unscrewing the square headed bolts to be a pain. Why didn't EFM use standard screws with hex heads so I can use a socket/ratchet? I'll have to find some replacements.

Also, what can I put on the end of the auger feed "square end" so I can attach a drill to it. It takes too long to feed new cold in the pot to start it after pulling it apart.

I can now shut down the boiler, pull the upper pipe/auger, clean out the 7 (nice 4 letter word) holes, put everything back together and restart it in about an hour now. I keep a separate set of tools of this job so I don't have to keep searching for them! :-) Hate the smell of sulfur when these holes get clogged.

Thanks,

Dave

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dcrane
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Hand Fed Coal Stove: Crane 404
Location: Duxbury, MA./Hanson MA./Brockton, MA

Post Sun. Jan. 05, 2014 6:50 pm

maybe this link can help you.... http://www.idrinkyourwine.com/photographcot/Squar ... ckets.html
seems to have lots of different options for square nuts N bolts?

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Scottscoaled
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Stoker Coal Boiler: EFM 520, 700, Van Wert 800 GJ 61,53
Baseburners & Antiques: Magic Stewart 16, times 2!
Coal Size/Type: Lots of buck
Other Heating: Slant Fin electric boiler backup
Location: Malta N.Y.

Post Sun. Jan. 05, 2014 7:12 pm

You can just retro them with 5/16" course thread x 1.25" bolts. I use stainless. I also use the allen head bolts.
I think a man does what he can, untill his destiny is revealed. Right now that is trying to sell my EFM plate boilers in 520 and 700 sizes.

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Dennis
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Posts: 1066
Joined: Sun. Oct. 30, 2011 5:44 pm
Hand Fed Coal Boiler: AHS/WOC55-multi-fuel/wood,oil,coal
Coal Size/Type: Anthracite/stove size
Location: Pottstown,Pa

Post Sun. Jan. 05, 2014 7:26 pm

daluds wrote: find unscrewing the square headed bolts to be a pain.
buy an "8 point socket" to fit the square headed bolt

Pacowy
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Stoker Coal Boiler: H.B. Smith 350 Mills boiler/EFM 85R stoker
Coal Size/Type: Buckwheat/anthracite
Location: Dalton, MA

Post Sun. Jan. 05, 2014 7:30 pm

Or maybe a crescent wrench.

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Scottscoaled
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Posts: 2597
Joined: Tue. Jan. 08, 2008 9:51 pm
Stoker Coal Boiler: EFM 520, 700, Van Wert 800 GJ 61,53
Baseburners & Antiques: Magic Stewart 16, times 2!
Coal Size/Type: Lots of buck
Other Heating: Slant Fin electric boiler backup
Location: Malta N.Y.

Post Sun. Jan. 05, 2014 7:44 pm

I would have EFM send you a crank to turn the auger faster to get the coal to the pot. In a pinch, you can take a 1/2" socket extension and bend it into a hand crank.
I think a man does what he can, untill his destiny is revealed. Right now that is trying to sell my EFM plate boilers in 520 and 700 sizes.

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Short Bus
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Stoker Coal Boiler: Kewanee boiler with Anchor stoker
Coal Size/Type: Chestnut / Sub-bituminous C
Other Heating: Propane wall furnace back up only
Location: Cantwell Alaska

Post Sun. Jan. 05, 2014 8:10 pm

Eight point socket probably 1/2" drive for the auger drive with a ratchet, and then replace the offending bolts with hex head.
If it was as easy as burning oil, everybody would be burning coal.
Forum reality, If you ask wheres a good steak house? You will be informed that what you really want is pork chops.
Enjoy it for what it is worth.

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Scottscoaled
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Posts: 2597
Joined: Tue. Jan. 08, 2008 9:51 pm
Stoker Coal Boiler: EFM 520, 700, Van Wert 800 GJ 61,53
Baseburners & Antiques: Magic Stewart 16, times 2!
Coal Size/Type: Lots of buck
Other Heating: Slant Fin electric boiler backup
Location: Malta N.Y.

Post Sun. Jan. 05, 2014 9:00 pm

The crank!
I think a man does what he can, untill his destiny is revealed. Right now that is trying to sell my EFM plate boilers in 520 and 700 sizes.

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Rob R.
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Joined: Fri. Dec. 28, 2007 4:26 pm
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Coal Size/Type: Lehigh Rice
Other Heating: Dad's 1953 EFM Highboy
Location: Chazy, NY

Post Sun. Jan. 05, 2014 9:24 pm

Hey Dave! Did you ever replace the pot auger and pipe? Still wondering how come you are the only guy that seems to have this problem.

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stoker-man
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Posts: 2063
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Hand Fed Coal Boiler: 1981 efm wcb-24 in use 365 days a year
Coal Size/Type: Anthracite/Chestnut
Other Heating: Hearthstone wood stove
Location: Lehigh Valley, PA

Post Sun. Jan. 05, 2014 9:49 pm

Use 5/16" coarse thread Grade 8 hex bolts. The square head are grade 8 steel.
‹(•¿•)›

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Rick 386
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Stoker Coal Boiler: AA 260 heating both sides of twin farmhouse
Hot Air Coal Stoker Stove: LL Hyfire II w/ coaltrol in garage
Coal Size/Type: Pea in AA 260, Rice in LL Hyfire II
Other Heating: Gas fired infared at work
Location: Royersford, Pa
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Post Sun. Jan. 05, 2014 10:11 pm

Dennis wrote:
daluds wrote: find unscrewing the square headed bolts to be a pain.
buy an "8 point socket" to fit the square headed bolt
I don't think you will find too many 8 point sockets in the store. Go with a 12 point socket. It will cover both the hex head (6 pt.) and also cover the square head (4 pt.)

Rick
Master of "Trial and Error."

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Short Bus
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Posts: 510
Joined: Sun. Jan. 10, 2010 12:22 am
Stoker Coal Boiler: Kewanee boiler with Anchor stoker
Coal Size/Type: Chestnut / Sub-bituminous C
Other Heating: Propane wall furnace back up only
Location: Cantwell Alaska

Post Sun. Jan. 05, 2014 10:28 pm

Sears has eight point sockets, the correct tool is nice to have, I've never had success with twelve point sockets on square heads.

Grade 8 bolts? If you can get at the nuts, I find low grade bolts are best so I can twist them off when they rust up. If these go into taped holes this is probably the worst advice ever given.

My family called them lead bolts, I went to a store asking for lead bolts and the storekeeper said I don't think they make them. I then asked for low grade bolts, grade two.
Last edited by Short Bus on Mon. Jan. 06, 2014 2:19 pm, edited 1 time in total.
If it was as easy as burning oil, everybody would be burning coal.
Forum reality, If you ask wheres a good steak house? You will be informed that what you really want is pork chops.
Enjoy it for what it is worth.

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stoker-man
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Posts: 2063
Joined: Mon. Nov. 19, 2007 9:33 pm
Hand Fed Coal Boiler: 1981 efm wcb-24 in use 365 days a year
Coal Size/Type: Anthracite/Chestnut
Other Heating: Hearthstone wood stove
Location: Lehigh Valley, PA

Post Mon. Jan. 06, 2014 5:27 am

There are no nuts, just tapped holes. The bolts have always been grade 8.
‹(•¿•)›

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Short Bus
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Posts: 510
Joined: Sun. Jan. 10, 2010 12:22 am
Stoker Coal Boiler: Kewanee boiler with Anchor stoker
Coal Size/Type: Chestnut / Sub-bituminous C
Other Heating: Propane wall furnace back up only
Location: Cantwell Alaska

Post Mon. Jan. 06, 2014 2:22 pm

Please disregard my previous advice about bolts, in tapped holes get bolts that will come out, not snap off. I apologies for speaking without fully understanding the issue. :oops:
If it was as easy as burning oil, everybody would be burning coal.
Forum reality, If you ask wheres a good steak house? You will be informed that what you really want is pork chops.
Enjoy it for what it is worth.

daluds
Member
Posts: 282
Joined: Fri. Jun. 20, 2008 9:27 am
Stoker Coal Boiler: EFM DF520
Coal Size/Type: Rice
Stove/Furnace Make: EMF
Stove/Furnace Model: DF-520

Post Mon. Jan. 06, 2014 2:32 pm

Rob R. wrote:Hey Dave! Did you ever replace the pot auger and pipe? Still wondering how come you are the only guy that seems to have this problem.
Not yet. I pinged Stoker-man to order them.

I planned to try a different brand of bagged coal, but can only get Kimmel's from my supplier. It has a lot of water.

I'll get the auger and pipes replaced this season to try to fix this issue. Smoke is bad especially when I am not home to fix it.

Thanks for all the other suggestions! All my sockets are 6 point so will look for some 8 or 12 point sockets.

Dave

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